417 lines
12 KiB
C
417 lines
12 KiB
C
/*
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* Copyright 2003 PMC-Sierra
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* Author: Manish Lachwani (lachwani@pmc-sierra.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <asm/pci.h>
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#include <asm/io.h>
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#include <linux/init.h>
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#include <asm/titan_dep.h>
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#ifdef CONFIG_HYPERTRANSPORT
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/*
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* This function check if the Hypertransport Link Initialization completed. If
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* it did, then proceed further with scanning bus #2
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*/
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static __inline__ int check_titan_htlink(void)
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{
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u32 val;
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val = *(volatile uint32_t *)(RM9000x2_HTLINK_REG);
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if (val & 0x00000020)
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/* HT Link Initialization completed */
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return 1;
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else
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return 0;
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}
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static int titan_ht_config_read_dword(struct pci_dev *device,
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int offset, u32* val)
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{
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int dev, bus, func;
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uint32_t address_reg, data_reg;
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uint32_t address;
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bus = device->bus->number;
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dev = PCI_SLOT(device->devfn);
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func = PCI_FUNC(device->devfn);
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/* XXX Need to change the Bus # */
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if (bus > 2)
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address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
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0x80000000 | 0x1;
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else
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address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
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address_reg = RM9000x2_OCD_HTCFGA;
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data_reg = RM9000x2_OCD_HTCFGD;
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RM9K_WRITE(address_reg, address);
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RM9K_READ(data_reg, val);
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return PCIBIOS_SUCCESSFUL;
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}
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static int titan_ht_config_read_word(struct pci_dev *device,
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int offset, u16* val)
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{
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int dev, bus, func;
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uint32_t address_reg, data_reg;
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uint32_t address;
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bus = device->bus->number;
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dev = PCI_SLOT(device->devfn);
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func = PCI_FUNC(device->devfn);
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/* XXX Need to change the Bus # */
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if (bus > 2)
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address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
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0x80000000 | 0x1;
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else
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address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
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address_reg = RM9000x2_OCD_HTCFGA;
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data_reg = RM9000x2_OCD_HTCFGD;
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if ((offset & 0x3) == 0)
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offset = 0x2;
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else
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offset = 0x0;
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RM9K_WRITE(address_reg, address);
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RM9K_READ_16(data_reg + offset, val);
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return PCIBIOS_SUCCESSFUL;
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}
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u32 longswap(unsigned long l)
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{
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unsigned char b1, b2, b3, b4;
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b1 = l&255;
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b2 = (l>>8)&255;
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b3 = (l>>16)&255;
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b4 = (l>>24)&255;
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return ((b1<<24) + (b2<<16) + (b3<<8) + b4);
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}
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static int titan_ht_config_read_byte(struct pci_dev *device,
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int offset, u8* val)
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{
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int dev, bus, func;
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uint32_t address_reg, data_reg;
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uint32_t address;
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int offset1;
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bus = device->bus->number;
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dev = PCI_SLOT(device->devfn);
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func = PCI_FUNC(device->devfn);
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/* XXX Need to change the Bus # */
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if (bus > 2)
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address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
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0x80000000 | 0x1;
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else
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address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
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address_reg = RM9000x2_OCD_HTCFGA;
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data_reg = RM9000x2_OCD_HTCFGD;
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RM9K_WRITE(address_reg, address);
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if ((offset & 0x3) == 0) {
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offset1 = 0x3;
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}
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if ((offset & 0x3) == 1) {
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offset1 = 0x2;
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}
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if ((offset & 0x3) == 2) {
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offset1 = 0x1;
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}
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if ((offset & 0x3) == 3) {
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offset1 = 0x0;
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}
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RM9K_READ_8(data_reg + offset1, val);
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return PCIBIOS_SUCCESSFUL;
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}
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static int titan_ht_config_write_dword(struct pci_dev *device,
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int offset, u8 val)
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{
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int dev, bus, func;
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uint32_t address_reg, data_reg;
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uint32_t address;
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bus = device->bus->number;
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dev = PCI_SLOT(device->devfn);
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func = PCI_FUNC(device->devfn);
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/* XXX Need to change the Bus # */
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if (bus > 2)
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address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
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0x80000000 | 0x1;
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else
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address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
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address_reg = RM9000x2_OCD_HTCFGA;
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data_reg = RM9000x2_OCD_HTCFGD;
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RM9K_WRITE(address_reg, address);
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RM9K_WRITE(data_reg, val);
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return PCIBIOS_SUCCESSFUL;
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}
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static int titan_ht_config_write_word(struct pci_dev *device,
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int offset, u8 val)
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{
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int dev, bus, func;
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uint32_t address_reg, data_reg;
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uint32_t address;
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bus = device->bus->number;
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dev = PCI_SLOT(device->devfn);
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func = PCI_FUNC(device->devfn);
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/* XXX Need to change the Bus # */
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if (bus > 2)
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address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
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0x80000000 | 0x1;
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else
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address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
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address_reg = RM9000x2_OCD_HTCFGA;
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data_reg = RM9000x2_OCD_HTCFGD;
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if ((offset & 0x3) == 0)
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offset = 0x2;
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else
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offset = 0x0;
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RM9K_WRITE(address_reg, address);
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RM9K_WRITE_16(data_reg + offset, val);
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return PCIBIOS_SUCCESSFUL;
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}
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static int titan_ht_config_write_byte(struct pci_dev *device,
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int offset, u8 val)
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{
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int dev, bus, func;
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uint32_t address_reg, data_reg;
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uint32_t address;
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int offset1;
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bus = device->bus->number;
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dev = PCI_SLOT(device->devfn);
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func = PCI_FUNC(device->devfn);
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/* XXX Need to change the Bus # */
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if (bus > 2)
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address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
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0x80000000 | 0x1;
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else
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address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
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address_reg = RM9000x2_OCD_HTCFGA;
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data_reg = RM9000x2_OCD_HTCFGD;
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RM9K_WRITE(address_reg, address);
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if ((offset & 0x3) == 0) {
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offset1 = 0x3;
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}
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if ((offset & 0x3) == 1) {
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offset1 = 0x2;
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}
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if ((offset & 0x3) == 2) {
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offset1 = 0x1;
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}
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if ((offset & 0x3) == 3) {
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offset1 = 0x0;
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}
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RM9K_WRITE_8(data_reg + offset1, val);
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return PCIBIOS_SUCCESSFUL;
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}
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static void titan_pcibios_set_master(struct pci_dev *dev)
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{
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u16 cmd;
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int bus = dev->bus->number;
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if (check_titan_htlink())
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titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);
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cmd |= PCI_COMMAND_MASTER;
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if (check_titan_htlink())
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titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
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}
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int pcibios_enable_resources(struct pci_dev *dev)
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{
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u16 cmd, old_cmd;
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u8 tmp1;
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int idx;
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struct resource *r;
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int bus = dev->bus->number;
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if (check_titan_htlink())
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titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);
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old_cmd = cmd;
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for (idx = 0; idx < 6; idx++) {
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r = &dev->resource[idx];
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if (!r->start && r->end) {
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printk(KERN_ERR
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"PCI: Device %s not available because of "
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"resource collisions\n", pci_name(dev));
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return -EINVAL;
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}
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if (r->flags & IORESOURCE_IO)
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cmd |= PCI_COMMAND_IO;
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if (r->flags & IORESOURCE_MEM)
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cmd |= PCI_COMMAND_MEMORY;
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}
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if (cmd != old_cmd) {
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if (check_titan_htlink())
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titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
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}
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if (check_titan_htlink())
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titan_ht_config_read_byte(dev, PCI_CACHE_LINE_SIZE, &tmp1);
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if (tmp1 != 8) {
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printk(KERN_WARNING "PCI setting cache line size to 8 from "
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"%d\n", tmp1);
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}
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if (check_titan_htlink())
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titan_ht_config_write_byte(dev, PCI_CACHE_LINE_SIZE, 8);
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if (check_titan_htlink())
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titan_ht_config_read_byte(dev, PCI_LATENCY_TIMER, &tmp1);
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if (tmp1 < 32 || tmp1 == 0xff) {
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printk(KERN_WARNING "PCI setting latency timer to 32 from %d\n",
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tmp1);
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}
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if (check_titan_htlink())
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titan_ht_config_write_byte(dev, PCI_LATENCY_TIMER, 32);
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return 0;
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}
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int pcibios_enable_device(struct pci_dev *dev, int mask)
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{
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return pcibios_enable_resources(dev);
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}
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void pcibios_align_resource(void *data, struct resource *res,
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resource_size_t size, resource_size_t align)
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{
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struct pci_dev *dev = data;
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if (res->flags & IORESOURCE_IO) {
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resource_size_t start = res->start;
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/* We need to avoid collisions with `mirrored' VGA ports
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and other strange ISA hardware, so we always want the
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addresses kilobyte aligned. */
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if (size > 0x100) {
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printk(KERN_ERR "PCI: I/O Region %s/%d too large"
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" (%ld bytes)\n", pci_name(dev),
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dev->resource - res, size);
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}
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start = (start + 1024 - 1) & ~(1024 - 1);
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res->start = start;
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}
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}
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struct pci_ops titan_pci_ops = {
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titan_ht_config_read_byte,
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titan_ht_config_read_word,
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titan_ht_config_read_dword,
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titan_ht_config_write_byte,
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titan_ht_config_write_word,
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titan_ht_config_write_dword
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};
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void __init pcibios_fixup_bus(struct pci_bus *c)
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{
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titan_ht_pcibios_fixup_bus(c);
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}
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void __init pcibios_init(void)
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{
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/* Reset PCI I/O and PCI MEM values */
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/* XXX Need to add the proper values here */
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ioport_resource.start = 0xe0000000;
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ioport_resource.end = 0xe0000000 + 0x20000000 - 1;
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iomem_resource.start = 0xc0000000;
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iomem_resource.end = 0xc0000000 + 0x20000000 - 1;
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/* XXX Need to add bus values */
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pci_scan_bus(2, &titan_pci_ops, NULL);
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pci_scan_bus(3, &titan_pci_ops, NULL);
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}
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/*
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* for parsing "pci=" kernel boot arguments.
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*/
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char *pcibios_setup(char *str)
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{
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printk(KERN_INFO "rr: pcibios_setup\n");
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/* Nothing to do for now. */
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return str;
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}
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unsigned __init int pcibios_assign_all_busses(void)
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{
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/* We want to use the PCI bus detection done by PMON */
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return 0;
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}
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#endif /* CONFIG_HYPERTRANSPORT */
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